For such a large place with home theater use I'd expect a the FV12 to be a better choice than either. That port will give you that extra performance at 20-30hz where it counts in a movie. Of course if you really must have sealed I would lean toward the Rythmik, but for HT I personally prefer ported subs. For Music I prefer sealed because the 20-30hz is rarely needed.Just wondering what would be overall more satisfiying for: HT 70% , Music 30%.
Room is in basement :4000cf with opening for staircase only ??
If looks could kill. Tightness comes with proper size, tuning and placement. I'd lean toward the Rhythmik.I wonder if the FV 12 is tighter than the LFM-1+ , the reason i did'nt include the FV 12 was that i don't like the looks of it !